Eric Mulder
Mid Sweden University
Internal medicineEndocrinologyBiomedical engineeringSaturation (chemistry)Contraction (grammar)CardiologyHemodynamicsMaterials scienceHypercapniaBradycardiaHuman brainHeart rateHemoglobinHypoxia (medical)Nadir (topography)Pulse oximetrySpleenApneaVascular compliancePulse oximetry monitoringPeripheral oxygen saturationEnvironmental exposureDeep breathBase campDeep diveLow altitude2019-20 coronavirus outbreakSevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2)Coronavirus disease 2019 (COVID-19)High altitude hypoxiaBreathingEnvironmental scienceVenous bloodOxygen saturation (medicine)BioinformaticsOxygenationMedicinePhotodiodeOxygen saturationPulse (signal processing)Effects of high altitude on humansBiologyUnderwater
7Publications
4H-index
18Citations
Publications 8
Newest
#1Eric Mulder (Mid Sweden University)H-Index: 4
#2Pontus Holmström (Mid Sweden University)H-Index: 3
Last. Erika Schagatay (Mid Sweden University)H-Index: 21
view all 3 authors...
BACKGROUND Apnea training enhances bradycardia and improves competitive apnea performance, and has been proposed as a training method for other sports, such as swimming. We evaluated the effects of apneic underwater swimming, i.e. dynamic apnea (DYN), in 9 competitive swimmers (TR) who completed ten DYN sessions over 2 weeks. METHODS TR performed pre- and post-training tests including a static apnea test with continuous heart rate (HR) and peripheral oxygen saturation measurements, all-out 50m a...
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#1J. Chris McKnight (St And: University of St Andrews)H-Index: 2
#2Eric Mulder (Mid Sweden University)H-Index: 4
Last. Frank Pernett (Mid Sweden University)H-Index: 1
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Continuous measurements of haemodynamic and oxygenation changes in free living animals remain elusive. However, developments in biomedical technologies may help to fill this knowledge gap. One such technology is continuous-wave near-infrared spectroscopy (CW-NIRS)-a wearable and non-invasive optical technology. Here, we develop a marinized CW-NIRS system and deploy it on elite competition freedivers to test its capacity to function during deep freediving to 107 m depth. We use the oxyhaemoglobin...
7 CitationsSource
#1Eric Mulder (Mid Sweden University)H-Index: 4
#2Frank Pernett (Mid Sweden University)H-Index: 1
Last. Erika Schagatay (Mid Sweden University)H-Index: 21
view all 3 authors...
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#1Eric Mulder (Mid Sweden University)H-Index: 4
#2Erika Schagatay (Mid Sweden University)H-Index: 21
Last. Arne Sieber (Mid Sweden University)
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Studying risk factors in freediving, such as hypoxic blackout, requires development of new methods to enable remote underwater monitoring of physiological variables. We aimed to construct and evaluate a new water- and pressure proof pulse oximeter for use in freediving research. The study consisted of three parts: (I) A submersible pulse oximeter (SUB) was developed on a ruggedized platform for recording of physiological parameters in challenging environments. Two MAX30102 sensors were used to r...
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Deep freediving exposes humans to hypoxia and dramatic changes in pressure. The effect of depth on gas exchange may enhance risk of hypoxic blackout (BO) during the last part of the ascent. Our aim was to investigate arterial oxygen saturation (SpO2) and heart rate (HR) in shallow and deep freedives, central variables, which have rarely been studied underwater in deep freediving. Four male elite competitive freedivers volunteered to wear a newly developed underwater pulse oximeter for continuous...
1 CitationsSource
#1Pontus Holmström (Mid Sweden University)H-Index: 3
#2Eric Mulder (Mid Sweden University)H-Index: 4
Last. Erika Schagatay (Mid Sweden University)H-Index: 21
view all 5 authors...
High-altitude (HA) natives have evolved some beneficial responses leading to superior work capacity at HA compared to native lowlanders. Our aim was to study two responses potentially protective against hypoxia: the spleen contraction elevating hemoglobin concentration (Hb) and the cardiovascular diving response in Sherpa highlanders, compared to lowlanders. Male participants were recruited from three groups: (1) 21 Sherpa living at HA (SH); (2) seven Sherpa living at low altitude (SL); and (3) ...
6 CitationsSource
#1Erika Schagatay (Mid Sweden University)H-Index: 21
#2Pontus Holmström (Mid Sweden University)H-Index: 3
Last. Angelica Lodin-Sundström (Mid Sweden University)H-Index: 7
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The human spleen can contract and transiently boost the blood with stored erythrocytes. We measured spleen volume and contraction during apneas in two groups, each containing 12 Caucasian participa...
8 CitationsSource
#1Pontus Holmström (Mid Sweden University)H-Index: 3
#2Eric Mulder (Mid Sweden University)H-Index: 4
Last. Erika Schagatay (Mid Sweden University)H-Index: 21
view all 5 authors...
Acute mountain sickness (AMS) is a potentially life-threatening illness that may develop during exposure to hypoxia at high altitude (HA). Susceptibility to AMS is highly individual, and the ability to predict it is limited. Apneic diving also induces hypoxia, and we aimed to investigate whether protective physiological responses, i.e., the cardiovascular diving response (CVD) and spleen contraction, induced during apnea at low-altitude could predict individual susceptibility to AMS. Eighteen pa...
6 CitationsSource